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copied!<p><code>to_python</code> AFAIK is a method for fields, not forms. </p> <p><code>clean()</code> occurs after individual field cleaning, so your <code>ModelMultipleChoiceFields</code> <code>clean()</code> methods are raising validation errors and thus <code>cleaned_data</code> does not contain anything.</p> <p>You haven't provided examples for what kind of data is being input, but the answer lies in form field cleaning.</p> <p><a href="http://docs.djangoproject.com/en/dev/ref/forms/validation/#cleaning-a-specific-field-attribute" rel="nofollow">http://docs.djangoproject.com/en/dev/ref/forms/validation/#cleaning-a-specific-field-attribute</a></p> <p>You need to write validation specific to that field that either returns the correct data in the format your field is expecting, or raises a <code>ValidationError</code> so your view can re-render the form with error messages.</p> <p><strong>update</strong>: You're probably missing the <code>ModelForm</code> <code>__init__</code> -- see if that fixes it.</p> <pre><code>class MovieModelForm(forms.ModelForm): def __init__(self, *args, **kwargs): super(MovieModelForm, self).__init__(*args, **kwargs) self.fields["actors"].widget = Textarea() def clean_actors(self): data = self.cleaned_data.get('actors') # validate incoming data. Convert the raw incoming string # to a list of ids this field is expecting. # if invalid, raise forms.ValidationError("Error MSG") return data.split(',') # just an example if data was '1,3,4' </code></pre>

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